Found the following significant warnings:
  t_region.cpp:78:6: warning: 'this' pointer cannot be null in well-defined C++ code; comparison may be assumed to always evaluate to false [-Wtautological-undefined-compare]
  t_info.cpp:115:6: warning: 'this' pointer cannot be null in well-defined C++ code; comparison may be assumed to always evaluate to false [-Wtautological-undefined-compare]
  t_info.cpp:120:7: warning: reference cannot be bound to dereferenced null pointer in well-defined C++ code; comparison may be assumed to always evaluate to false [-Wtautological-undefined-compare]
  tabix/razf.c:106:12: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:109:3: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:116:2: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:117:2: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:134:2: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:143:2: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:149:2: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:213:3: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:233:3: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:246:4: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:270:4: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:432:3: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:440:3: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:825:4: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:826:4: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:829:4: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
  tabix/razf.c:831:4: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
See '/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/WhopGenome.Rcheck/00install.out' for details.